# import copy
# name1=['张三','李四','王五','赵六','陈七']
# name2=[['张三','李四','王五'],'赵六','陈七']
# name3=name2.copy()
# name4=copy.deepcopy(name1)
# name5=copy.deepcopy(name2)
# name2[0][1]='郭德纲'
# name1[2]='yuqian'
# name2[2]='zs'
# print(name1,'\n',name2,'\n',name3,'\n',name4,'\n',name5)


l=[x*x for x in range(1,5)]
print(l)
l2=['{}*{}'.format(x,i) for x in range(1,4) for i in range(1,4)]
print(l2)

l3=['{}*{}'.format(x,i) for x in range(1,4) for i in range(1,4) if i%2!=0]
print(l3)

l4=[]
for i in range(1,1000):
    n=0
    for x in range(1,i+1):
        if i%x==0:
            n+=1
    if n==2:
        l4.append(i)
print(l4)